Screen Diagonal Formula:
From: | To: |
Definition: This calculator determines the diagonal screen size of a monitor or display based on its width and height measurements.
Purpose: It helps users understand the actual screen size when only width and height dimensions are available, or to verify manufacturer specifications.
The calculator uses the Pythagorean theorem formula:
Where:
Explanation: The diagonal is calculated as the square root of the sum of the squared width and height measurements.
Details: Knowing the exact diagonal size helps when comparing monitors, setting up workspaces, or determining viewing distances.
Tips: Enter the width and height in inches (measured from corner to corner of the visible screen area). Both values must be > 0.
Q1: Does this include the monitor bezel?
A: No, this calculates only the visible screen area. Measure just the display portion, not the frame around it.
Q2: Why is my calculated size different from the advertised size?
A: Manufacturers sometimes round sizes (e.g., 23.6" may be marketed as 24"). Also ensure you're measuring only the visible screen.
Q3: Can I use this for TVs and other displays?
A: Yes, this works for any rectangular display - monitors, TVs, laptops, tablets, etc.
Q4: What about curved screens?
A: For curved displays, measure the flat width and height (not following the curve). The calculation remains valid.
Q5: How precise should my measurements be?
A: For best results, measure to at least 1/4 inch (0.25") precision, especially for smaller screens.